Globe Valve Series

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reduce the velocity

2010-10-19

Yes, reducing exit velocity reduces noise. In order to reduce the velocity, the flow area needs to expand in the direction of flow. Correspondingly, this is why the fluid flow outward through the cage as there is greater available area at the trim exit. If the fluid were to flow inward through the cage, the flow path at best maintains a constant flow area but generally contracts. For instance, if you had a cage with a 1 inch ID and 3 inch OD, the outer circumference is 9 times larger than the inner circumference. The valve is used for isolation of each vaporizer. There are three vaporizers in parallel, with a globe valve on the upstream side, and a motorized ball valve on the downstream side. The valve may seal effectively with flow in the opposite direction; however, the manufacturer should be contacted to verify. If this is a y-pattern valve, you probably wouldn't want to reverse the installation even if the manufacturer said it could seal.

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